Table of Contents
Advertisement
ELECTRICAL CONNECTIONS
Warning: This appliance MUST be earthed.
A PERMANENT mains supply of 230V 50Hz is required. Ex-
ternal controls should NOT be wired in series with these mains
inputs. Controlling the boiler in this way will prevent the pump
over-run sequence and may cause damage to the boiler. The
supply wiring MUST be suitable for mains voltage. Wiring
should be 3 core PVC insulated cable NOT LESS than
0.75mm2 (24 x 0.2 mm) and to BS. 6500. The fuse rating
should be 7A.
Wiring external to the boiler MUST be in accordance with the
current I.E.E. (BS7671) wiring Regulations and any local regu-
lations. For Ireland reference should be made to the current
ETCI rules for electrical installations
INSTALLING THE MAINS AND CONTROL WIRING
To access the electrical connections remove four screws and lift off the control panel cover.
1.
Route all 230V circuits in at the rear of the control panel
2.
Route all low voltage remote sensor/control cables through a separate grommet.
3.
Secure the cables with the cable clamps provided on the main controls panel
Connection should be made in a way that allows complete
isolation of the electrical supply - such as a double pole switch,
having a 3mm (1/8") contact separation in both poles, or a
plug and unswitched socket serving only the boiler and system
controls. The means of isolation must be accessible to the
user after installation.
When making mains electrical connections to the boiler it is
important that the wires are prepared in such a way that the
earth conductor is longer than the current carrying conductors.
WARNING. Sensor cables must be separated from cables
in the 230V circuit.
15
Advertisement
Table of Contents
